# std::pmr::polymorphic_allocator<T>:: select_on_container_copy_construction

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< cpp‎ | memory‎ | polymorphic allocator

polymorphic_allocator select_on_container_copy_construction() const; |  | (since C++17)

Returns a default-constructed `polymorphic_allocator` object.

### Parameters

(none)

### Return value

A default-constructed `polymorphic_allocator` object.

### Notes

`polymorphic_allocator`s do not propagate on container copy construction.

### See also

select_on_container_copy_construction [static] | obtains the allocator to use after copying a standard container (public static member function of `std::allocator_traits<Alloc>`)

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